robglidden

Thanks for suggestion, I retested and there is still no apparent conflict between the edited plugin and Ninja Forms when Kadence is deactivated. Problem is only when all three are activated. Maybe some other lodash or underscore subtle incompatibility is lurking.

But your suggested workaround to import lodash differently from the “official” gutenberg way in the latest-posts blocks works for me, so I am good. Thanks.

I read the Github post slightly differently. Like most blocks now I assume, the edited block uses the standard gutenberg npm babelrc preset @wordpress/default. And the standard loading technique used by gutenberg itself. So seemingly, stuff should work.

I am guessing that most folks will do and think similar going forward, and will not try to come up with their own babel preset configuration to avoid one-off conflicts with other plugins. And they will assume that if something works in a standard Gutenberg block, it will also work in a custom block.

So whatever is the real issue, some folks will potentially find themselves in this same lurking conflict when some plugin uses underscore instead of lodash.

Anyway the original error I posted is pretty cryptic, like the Github post says.

Thanks for your workaround. Much appreciated.

Yes, this seems to be related to how Kadence and/or Ninja Forms loads lodash, perhaps the lodash.undefined function.

The addition to Gutenberg starter theme that seems to trigger problem is a block that is a modified version of the standard gutenberg latest posts block. The modified block is a renamed copy of the standard latest posts block but adds the ability to select by custom post type, which is not included in the standard block.

In edit.js of the standard latest posts block (and the modified one):

import { isUndefined, pickBy } from ‘lodash’;

I see that Kadence blocks seems to load its own version of lodash (“__lodash_hash_undefined__”)

When all three are loaded (kadence, ninja forms, and the modified version of latest posts), the error occurs. But not if any two of them are loaded.

Hope this helps. An amateur guess would be that both Kadence, Ninja Forms, and gutenberg edit.js file of latest-posts blocks load lodash in a subtly conflicting way.